Module Submenu; User Gain; Delay; Phase Reverse - Lab.gruppen PLM Series Operation Manual

9.12.2 Module submenu

This submenu is selected by pressing soft button 2,
named Module from the menu top page.
Menu
Module

User Gain

Delay

Polarity
Figure 9-18
The options available are as follows:
9.12.2.1 User Gain
This option is selected by pressing soft button 2
(User Gain) from Menu è Module.
This allows the Module gain to be adjusted at two
different places. Soft buttons 2 and 3 select Module A
or Module B inputs respectively for gain adjustment.
Soft buttons 5-8 select Module outputs 1-4 for
gain adjustment. Gain may be adjusted in 0.1 dB
increments from -100 dB to +20 dB. The Module
gain parameters may also be adjusted from the DLC
PLM Edition software.
The Group Sum value is also displayed (in brackets)
for this parameter for each channel.
9.12.2.2 Delay
This option is selected by pressing soft button 3
(Delay) from Menu è Module.
The audio signal may be delayed (typically for reasons
of driver or delay tower alignment) at either the PLM
inputs or on individual outputs. Delay added at the
inputs will, of course, affect all outputs equally, and
will be generally be introduced to time-align arrays
of loudspeakers at different locations. Delaying
individual outputs may be desirable to time-align
drivers in the same cabinet or array.
Delay is adjustable in increments of 0.1 mS. Maximum
input delay is 1.8 S, and maximum output delay is
100 mS. The Module delay parameters may also be

Amp Gain

Limiters

Mute
FRONT PANEL INTERFACE 9
adjusted from the Dolby Lake Controller PLM Edition
Software.
The Group Sum value is also displayed (in brackets)
for this parameter for each channel.

9.12.2.3 Phase Reverse

This option is selected by pressing soft button 4
(Polarity) from Menu è Module.
Audio phase reversal is available at the inputs to
Module A and Module B, and also individually on the
four output channels. The on-screen text displays
"Positive" for normal operation, and "Negative"
when a signal is phase inverted. The input or output
may be selected with the adjacent soft button and
the polarity changed with the rotary encoder. The
Module phase reverse settings may also be adjusted
from the DLC PLM Edition software.
9.12.2.4 Amp Gain
This option is selected by pressing soft button 5
(Amp Gain) from Menu è Module.
This adjusts the gain of the PLM's power output stage
for each output channel. The default gain setting is
35 dB, but this is variable in 0.1 dB increments from
22 dB to 44 dB. Care should be taken in altering Amp
Gain, which should be adjusted in conjunction with
the User Gain controls (see section 9.12.2.1).
9.12.2.5 Limiters
This option is selected by pressing soft button 6
(Limiters) from Menu è Module.
Various parameters of the PLM's Inter-Sample
Voltage Peak Limiter (ISVPL) and the Dolby Lake
processing system's LimiterMax can be adjusted in
this submenu. By default, simultaneous adjustment
of most limiter parameters in all four output channels
is selected, though channels may be adjusted
individually if desired. Attack and Release times are
exceptions to this.
PLM Series Operation Manual 39